Serum Proteomic and Metabolomic Signatures of High Versus Low Physical Function in Octogenarians.

Physical function declines with aging, yet there is considerable heterogeneity, with some individuals declining very slowly while others experience accelerated functional decline. To gain insight into mechanisms promoting high physical function with aging, we performed proteomics, targeted metabolomics, and targeted kynurenine-focused metabolomic analyses on serum specimens from three groups of octogenarians: High-functioning master athletes (HF, n = 16), healthy normal-functioning non-athletes (NF, n = 12), and lower functioning non-athletes (LF, n = 11). Higher performance status was associated with evidence consistent with: Lower levels of circulating proinflammatory markers, as well as unperturbed tryptophan metabolism, with the normal function of the kynurenic pathway; higher circulating levels of lysophosphatidylcholines that have been previously associated with better mitochondrial oxidative capacity; lower activity of the integrated stress response; lower levels of circulating SASP protein members; and lower levels of proteins that reflect neurodegeneration/denervation.

Markers of mitochondrial function and oxidative metabolism in female skeletal muscle do not display intrinsic circadian regulation.

Mitochondria are key regulators of metabolism and ATP supply in skeletal muscle, while circadian rhythms influence many physiological processes. However, whether mitochondrial function is intrinsically regulated in a circadian manner in mouse skeletal muscle is inadequately understood. Accordingly, we measured post-absorptive transcript abundance of markers of mitochondrial biogenesis, dynamics, and metabolism (extensor digitorum longus [EDL], soleus, gastrocnemius), protein abundance of electron transport chain complexes (EDL and soleus), enzymatic activity of SDH (tibialis anterior and plantaris), and maximum uncoupled respiration (tibialis anterior) in different skeletal muscles from female C57BL/6NJ mice at four zeitgeber times (ZT), ZT 1, 7, 13, and 19.

Exploring Midwives' and Nurse-Midwives' Professional Identity and How Midwifery May Be Best Represented in the Public Realm: A Global Convergent Parallel Mixed-Methods Study.

Aims: With respect to midwives and nurse-midwife populations (1) measure and (2) explore professional identity and (3) explore how the midwifery profession may be best represented in the public realm.

Design: Convergent Parallel Mixed-Methods Design.

Methods: A web-based survey was used to collect data from 860 midwives and nurse-midwives from 102 countries between February and July 2022.

Comparing post-treatment urinary and colorectal procedures in prostate cancer patients using population-based linked data.

Purpose: To investigate urinary and colorectal procedures among men who underwent radical prostatectomy (RP) and external beam radiotherapy (EBRT).

Methods: We studied 16,271 (RP = 8516 and EBRT = 7755) South Australian men diagnosed with prostate cancer between 2001 and 2021. Colorectal and urinary procedures were extracted from hospital admission procedure codes and Medical Benefits Schedule item codes.

Pre-exposure prophylaxis access, uptake and usage by young people: a systematic review of barriers and facilitators.

Background: Young people's sexual health decision-making, including decisions to access and adhere to HIV prevention strategies such as Pre-Exposure Prophylaxis (PrEP), are influenced by a range of internal and external factors. Synthesizing these factors is essential to guide the development of youth-focused PrEP health promotion strategies to contribute to international goals of ending HIV transmission.

Objective: To understand the individual, interpersonal, sociocultural and systemic barriers and facilitators to PrEP access, uptake and use experienced by young people 24 years and younger.